I think you confirm-track too much (for too long) and sometimes you just "drop" targets because "screw it it's hard", as if you're overwhelmed visually by amount of targets
also flick speed can be better, a lot of times you drag slowly, while we should strive to do fast clean flick on target (or under a bit) in direct motion with enough de-acceleration in end part of flick (so that you don't have to use a lot of tension to drop-stop mouse)